How did the pony express improve communication in america?

Below is a digram of a hypothetical bill. which of the following must be the missing legislative step in the diagram?

Aprovision of the general agreement on tariffs and trade treaty (gatt)increased taxes on services between the us, mexico, and canada.reduced international tariffs on industrial goods by forty percent.increased us tariffs on agricultural products by forty percent.ended taxes on goods traded by the us, mexico, and canada.

Who is the speaker in this excerpt from book 13 of homer’s odyssey, and what inference can you make from the tone?